Which of the following is a main factor behind U.S.population change?

Question

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Immigration from Latin America and Asia is a main factor behind U.S. population change. Between 1965 and 2015, the U.S. saw a significant increase in immigration from these regions, which has driven population growth and contributed to greater ethnic and cultural diversity. Additionally, the fertility rates of immigrants from these regions tend to be higher than those of native-born Americans, further driving population growth. Lower birth rates among new immigrants (A) is not a major factor, as their birth rates are still generally higher than those of native-born Americans. Increasing rates of interracial marriage (B) may contribute to population change in the long-term, but it is not a major factor at present. The elderly population is not shrinking (C), but rather growing as the baby boomer generation enters older age.

Which of the Following Is a Main Factor Behind U